Adjustable crusher-head for rock-crushers.



E. L. PBMBERTON. ADJUSTABLE ORUSHER HEAD FOR BOOK GRUSHBRS.

APPLICATION FILED P123413 1912.

Patented Aug. 6, 1912.

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U F3 Z y a L t r/ fl .0. m A I. Q I H r w 1 Improvements inAdjustable Crusher-Heads 3 1 .QFFIGE.

EDWARD L. rnmnnarou, or NEW HAVEN, CONNECTICUT, ASSIGNOB'TO Enema ALLEN -AMERICAN MANGANESE STEEL COMPANY, OF AUGUSTA, MAINE, A CORPORATIDN Specification of I-ctters'lPatent.

' A DJI ISTA'BLE cnusmnnan non nocx-ennsanns,

Patented Aug,-6, 19 12.

To all whom it may concern:

Be it known-that I, EDWARD L. PEMBER- TON, a citizen of the United States,-and a resident of. New Haven, in the county of New Haven and State of Connecticut, have made andinvented certain new and useful for Rock-Crushers, of'which the following is a specification.

My invention relates to crusher heads for gyratory crushing mills designed for crushing stone, ore, and similar hard substances;

' and more particularly to that type of tain a tig crusher head in which a supporting core or center is secured to or formed integrally with a shaft whereby the head isoperated and to which core a surroundin mantle is secured, so that the mantle may-%e removed from the core when it has become worn in use and replaced by a new mantle;

The surrounding shell or mantle of crusher heads of the type above referred to is commonly formed from east manganese steel in order 'to provide excessive hardness and toughness for the same. -A mantle made of this material, however, becomes stretched in use and loose upon the supporting core,

because the material of which it is madewhile exceedingly hard and tough, is neverthless quite ductile, from which it follows that in practical use the mantle 'will need to be fre uently adjusted in order to maint fit betweenit and the support ing core.

The supporting core-or center of crusher heads of the type above referred to is commonly made conical and placed with the small end upward when m use, and, as the mantle is also conical in form, it .follows that looseness between the core and mantle resulting from stretching of the mantle when in use is most readily compensated for by moving the mantle downward upon the supporting core; and the object of m invention is to provide improved means or moving the mantle longitudinally of the supporting core and for securing it in position after it has been adjusted to secure a tight fit between the core and mantle.

A further ob'ect of my invention to,

provide a crusher head having a surround-- ing mantle adjustable longitudinally theref- -upon, and which head ma .be easily and readily manufactured, whic will basimple tary view showing a 'endof a slightly modified form of' my imin construction and effective for the purposes for which it is designed.

With the above and other objects of invention in View, my invention consists in" the improved crusher head and means for ad usting the mantle thereof longitudinally upon its supporting core hereinafter de" scribed and claimed, and in such variations and modifications thereof as will be obvious to those skilled in the art to which my invention relates.

In the accompanying drawing wherein the preferred embodiment of my invention is- F illustrated; Figure 1 is a view showing a section of my improved crusher head upon a vertlcal central plane, the shaft through which the head is driven being shown'in elevation; Fig. 2 is a view showing a'section of the mantle only upon acentral vertical plane at right angles to the plane of Fig. 1 this view showing the internal features 0 the mantle ;.Fig. 3 is a view showing a supporting core or center formed integrally with the driving.shaft,'and not separable therefrom as in Fig. 1; Fig. 4 is a fragnienortion of the upper proved crusher head; Fig. 5 is a view showing theupperend of the mantle in plan' Fig. 6 is a view showing my improve crusher head as seen from a 'positlon beneath it; Fig. 7 is a view showing a looking plate used in my device; Fig. 8 is a view showing a modified form of locking plate; and, Fig. 9 is a fragmentary view showing a modified arrangement of an adjusting rack forming apart of my device.

Referring to the drawings, the reference numeral .10 designates the main drivingshaft'of agyratory crushing mill, and'll is a supporting core or center which serves as a support for a removable mantle 20 and which core' m'ay be formed either sepxas'ately from the shaft 10 and driven there m by means of a suitable key, as shown in Fig. 1 or integrally with the shaftas sho wn in Fi 3, the said core being secured upon the shal t in'the form shown in Fig.-1, by means lock nuts 12 in a manner well understoodby those skilled inthe art. This su portin core or center is of'general conical orm.

,aS shown at 13 portion of the upper end thereof is, however, a preferably'madecylindrical Figs. luandfi although it may be; conical Q Lassen throughout its entire length, as shown in Fig. 4. In either case, the'periphery of the core is provided with longitudinally extend is immaterial, and the lower ends of these grooves communicate with recesses or pockets 15 within which are located" ad usting screws or worms 16. I

In the drawings I have illustrated two only of the grooves 14 as communicating with recesses in which adjusting screws are placed, as two'such screws located upon op p0.- site sides of the core will ordinarily be found sufiicie'nt, although it will be understood that such 'recesses and adjusting screws may be.

provided at the lower end of each of the longitudinal grooves 14 whatever may be .the number of such grooves used. The adjusting screws 16 are provided with trunnions 17 18 which rest in bearings formed in the supporting core, as best shown in Fig. 3, and the lower trunnion 18 is prolonged and made square in order to receive a suitable wrench for turning the screw, and to receive locking plates '19, which, when in place, prevent the screws from turning, as will be hereinafter 'more fully described. I

' .Thereference character 20 designates a mantle conical in form which surrounds the supporting core 11 and is adjustable longitudinally. thereof and thereupon, as above explained. The upper end of this mantle is provided with inwardly extending lugs '21 corresponding in number with and extending into the upper ends of thelongitudinal grooves 14. Intermediate lugs 22 are also provided which project from the inner. surface of the mantle, and intothe longitudinal grooves 14, as many of such intermediate lugs being provided along the length of the mantle as may be found nec-. essary in order to drive-the mantle, it being understood that the mantle is driven from the core or center through the lugs21 and 22.

The inner surface of the lower end of the mantle 20 is provided with racks 23 corresponding in number with the number of adjusting screws Iii-employed in a particular head, and which racks are engaged by the said screws as best shown in Fig. 1. These racks maybe formed integrally with the mantle as shown in Fig. 1, as the same is cast, or the racksmay be formed separate from the mantle and embedded therein as the mantle is cast, the racks in such cases being placed in the molds before the fluid 60.

metal from which the mantle formed is poured theremto, a rack secured in place in this .way being shown at 24;, 9.! ,The. lugs 22 and racks 23 are" located 1n grooves '25 extending lon 'tudinally of themant-le 20.

The lower en of the supporting core 11 *bers; a rack carried by the other.

recesses, as shown in Fig. 6, within which recesses the locking plates 19 lie,. the plates being held in position by keys 26 extending through the lower trunnion 18 of'the adjustlngscrews.

shown at 27, Fig. 8. The recesses in which the locking plates lie'will in'all cases correspond in form with the shape of the plate. In View of the premises it will be obvious that'upon removing the keys 25 and locking plates 19 from the lower. trunnion of the adjusting screws, the screws may be engaged by a wrench androtated upon their axes, whereby the mantle 20 will be moved downward upon the supporting core' 11 to take up any looseness which may have developed between, the mantle and core due to stretching the mantle. been moved downward to secureta tight fit between it and the supporting core, the locking plates '19 will'bereplaced and secured in position upon, the trunnion -18, to. thereby prevent the adjusting screws from turning when the head' is in use.

The upper end of the mantle 2O issubjected to less wear when the head is in use mantle, from which it follows that the up-.

per end thereof will stretch but little, while the lower portions of. the mantle will stretch to a much reater extent. It there- -and mantle 20 are provided with registering After the mantle has fore follows that t e upper end of the core may be cylindrical, as shown at 13 without interfering with the longitudinal adjustment of the mantle upon the core; although as explained above, the core may be conical throu hout, in'which case the upper end of the-mantle will be made to fit '-somewhat Y.

' loosely about the upper end of the supporting core.

Having thus described and explained my invention, I claim and desire to secure by Letters Patent: I

' 1; In a crusher head, a conical supportingcore;'a conical mantle surroundin said core and adjustable longltudinall th eu worm carried by one of. saidimembers; a

rack carried by the other of said membersand with which said worm engages; and

means whereby said mantle is driven frbm saidcore. 1 2... In a crusher head, a conical supporting core; a conical'mantle surrounding ,said' core and ad ustable.longitudinally-,thereupon; a worm carriedv by one of sai one of said members and; terminating at, oneend thereof; and 3. lug upon the other of 1,3

said membersand which lug projects into said groove.

. 3. "In a crusher head, a conical Supporting core; a conical mantle surrounding said core and adjustable longitudinally thereupon; a groove extending longitudinally of one of said members and terminating at one end thereof;'a lu upon the other of said members and w ich lug projects into said groove; and means including a rack carried by one of said members and a worm carried by the other member and in engagement with said rack for adjusting said mantle longitudinally upon said core.

4. In a crusher head, a conical supporting core having a longitudinally extending groove upon its periphery and the lower end of-which groove 15 enlarged to form a recess or pocket;a conical mantle surrounding said core and adjustable longitudinally thereupon, said mantle having a lug upon its inner surface which projects into the oove aforesaid upon said core; a worm 'ocated withinv the recess or pocket aforesaid; and a rack carried by said mantle and with which said worm engages.

5. In a crusher head, a conical supporting core having a longitudinally extending groove upon its periphery and the lower end of which groove is enlarged to form a recess or pocket; a conical mantle surrounding said core and adjustable longitudinally thereupon, said mantle having a lug upon its inner surface which projeets'into the groove aforesaid upon said core; a worm located within the recess or pocket aforesaid and having su porting trunnions supported .in bearings ormed in said core and throu h one of which trunnions said worm may lie operated; a rack carried by said mantle and with which said worm engages; and a looking plate located within a recess formed in the lower end of thecrusher head and in locking engagement with the trunnion throu h which the worm is operated.

6. n a crusher head, a conical supporting core having a lon itudinally extendin groove upon its periphery and the lower en of which groove is enlarged to form a recess or pocket; a conical mantle surrounding said core and adjustable longitudinally thereupon, said mantle having a lug upon its inner surface which projects into the groove aforesaid upon said core; a worm located within the recess or pocket aforesaid and having. sup orting trunnions supported in bearin s ormed in said core and through one of w ich trunnions said worm may e operated; a rack carried by said mantle and with which said ,worm engages; and means for locking said worm against rotation upon said trunnions.

Signed at New York, Manhattan, in the county of New Yorkand State of New York this 10th clay of February, -A. D. 1912.

EDWARD L. PEMBERTON.

Witnesses: R. N. FLINT,

v H. M. Warm. 

